Watchcase heater



Aug. 9, 1932. DENMRE 1,871,118

WATCHCASE HEATER Filed March 7. 1927 s Sheets-Sheet 1 INVENTOR Heroic! A.Denmire BY ATTORNEYS Aug. 9, 1932'. H. A. DENMIRE 1,871,118

WATCHCASE HEATER I Filed March 7. '1927 s Sheets-Sheet 2 INVENTOR Harold A.Dcnmir ATTORNEYS 1932- H. A. DENMIRE 1,871,118

WATCHCASE HEATER 1 Filed March 7, 1927 :5 Sheets-Sheet 5 W m it 1; 1 A

INVENTOR Harold. A .Denmwe Patented Aug 9, 1932 mornannnnmn, OEAKRON, 501110, nssrelvon mourns-GENERAL TIRE a; Bunsen COMPANY, ."OF AKRON, OHIO,-.-A-CORPOBA' IION OF OHIO;

wA'rcncAsn mm.

Application ar a Maren 927.; sri' in. 173,360.

This invention relates to watch case heaters and it hasfor one of itsobjects, the provision of a greatly simplified and improved type of heated for particular use in the rub fiber industry. i Another object of the invention is to provide ahydraulically actuated watchcase heater wherein adequate closing pressure can be obtained for curing either solid or hollow 10 articles therein without the'usel'ot undesirably high liquid pressures.

' A further object of the'invention is to'provide awatch case heater wherein the mold units may be easily" an d quickly changed with- 16 out removal of the mold shells from: the

associated steani jacket. F p Another objectof the invention is toprovide a watch case heater wherein theassembled mold units are removably supported from the hydraulic unit. p,

An additionalobject of the invention is to provide a watch case heater wherein the door of the heater isclosed bythe direct pullof a hydraulic piston of greater diameter than the internal diameter of the molding cavity.

Other objects and advantages to be derived from practicing the invention'will be apparent to those skilled in the art. p 1 7 Preferred embodimentsro f the invention are shown in the accompanying drawings wherein:

Figure 1 is a front elevational view of a watch case heater embodying the invention.

Fig. 2 is a side elevational view of the heater shown in Fig. 1.

Fig. 3 is a horizontal sectional view of the heater shown in Figs. 1 and 2, taken substantially on line 33 of Fig. 1.

Fig. 4 is a corresponding horizontal sectional view of a modified form of heater eminder is closed at its outer end by a cylinder door from" the piston.

' by suitable reinforcing webs 16. The mold sulati-ng plates 18 and -19-thalt are capable of section may be integral with the steam jacket or removably connected thereto in accordance with conventional practice. "Oneof the mold head 9 that-has a suitable packing gland 10 I through which a piston rod 11 extends; The inner end 0f each-cylinder is closed, if 'desired, bya partition 12,01: the same' cylinder' may be used for both pistons as set forth in my prior application SerialNo. 1'39,485,'filed Oct-4 1926, andis entitled"Watch case heats er? A suitable piston 13 is} mounted in'each cylinder to be acted on by-hydraulic'"pressure applied between the cylinder head and "the piston. Pressure, preferably air, that is applied between the partition 12 and therespective pistons 13 servesto move'thepistons "to their outermost positions, thus permitting. the molds to be opened by release of themold Theheater body l also has a-pair ofspaced annular-flanges 1 1 and 15 extending outwardly therefrom-that are connected at intervals units 5 and 6; although preferably-supported 7 from the brackets 3*and 4 that are'respe'c tively-formed onthecylinder heads, are secured in place by stud bolts 17;. Heatinwithstand-mg the hydraulic pressure imposed uponthe mold units; provide seating faces for the mold. units. The supporting. brackets'w 3 and 4' each comprise aplurality of radially I arranged webs that engage the 'inner'face'20 3 of one of the mold sectionsi The mold sections 21-and22that are hinged together by a pintle 23, together form the "watch case mold unit 5 that'is supportedfrom "the bracket 8. Each mold section prefer" ably has asteamcavity 24: by means'of which the moldis heated "for the vulcanization or curing'ofrubber articles p'lacedthereinf The moldingffaoe' 25hr mold shells of each mold sectionsv preferably has .anannular seating lug 26 formed thereon for receiving the securing stud bolts 17. Theothermoldsection has a pair of opposed pressurelugs 27 formed thereon and adapted to receivethe hy- "draulic pressure applied. to the correspond- 1 ing pistonthrough thefpiston rodjill-and the rotatable connecting head 28, "thereby serv ing to. close. the mold with great pressure. The hinge pintles are sufliciently loose in one of the mold sections to permit complete closing of the mold units. Any suitable means is, employed for causing the mold sect-ions to properly register. Each mold section also preferably has a lifting-ring 29 bymeans of w'hichthe mold unit's maybe lifted and re;

v moved or mounted on the supporting base;

' The operation -ofthe? heater I will be ob- V vious to those skilled in the art. The-mold unit is brought to positionon the supporting brackets 3 or 4 and the stud bolts 17'are tight ened up to hold the mold unit in place. The steam jackets are then connected 1 with the heating fluid; The mold cavity is charged isthen released and air under pressure is introduced betweenthe piston and'the cyline der partition to move the piston to its outer most position; The connecting head 28 is then turned and the mold opened.

' h It will readily. be seen from the precedvjing description that the hydraulic, pressure is directly applied to the mold; that the mold vunits are readily and quickly removable; that the operation of the unit depends upon the speed with whichmaterials'may be introduced into the molding cavity; that any desired molding pressure can be obtained; and

that the dangers of jamming mechanical parts i .and thuspreventing complete closure of, the

molds are obviated;

, Themoldunit shown in Fig.4 differs from the previously described unit principally in the manner. ofsupporting the moldunit from the hydraulic mechanism. Inthis form of heater, the cylinder head has a series of supporting web-like brackets 30 that engage the inner face and one lateral face of the mold =section, One of the webs is enlarged and recessed to form a seat for a key 31 that engages a suitable keyway of the mold unit to prevvent turning of the mold on the support. The" outer ends ofthe webs are connected by an annular flange32 of the cylinder head. The spaces betweenthe cylinder head-and ,the supporting facespof the moldunits may be filled in .withanysuitable heat insulating v material, .to prevent. imdesirable' conduction tof heat. from .the Inold unit to thehydraulic I unit., This mold unitdoesnot require any remove and securing :lugs and. is very fast to mount. in place.-

Many of 7 he advantages inherent in this proposed heater will be apparent to those skilled in; the art. The operation of the heat molds from the jamming of mechanical parts is-avoided. The saving in the expense of manufacture of the heater is also Very large because of the simplified mechanical construction proposed. Any desired size of piston 7 can be .used without regard to the internal diameter of the-.mold'and the advantages of a straight line hydraulic pull between the -piston and themold doorare obtained. It is also important thatth'ehydraulic mechanism maybe thermally. insulated from the heating jackets of the mold units thereby preventing undue sweating of the hydraulicparts with resulting damage to the molded materials andenabling cold water to be used for :obtaining hydraulic pressure.

Althoughonly preferred embodiments of the invention are specifically described, other heater structures. embodying the invention will be apparent to those skilled in the art and I desire, therefore, that the invention be protected. as; broadly as the prior art will permit, I H

WhatIclaimisz. i 1. Awatch case heater comprising a base having a hydraulic cylinden therein: with opposed pistons, mounted therein and piston rods extending through thecylinder heads, .andassembled mold units composed of sep- {arablesections and .removablymounted on said base,and meanscarried by the 7 piston rods and engageable with the outer 9f the mold sections to closethe mold; p

p 2'. A .watch case heater comprising abase having a cylinder jarranged transversely thereof, a pair of opposed pistons mounted within the cylinder, outwardly opening hinged molds secured to opposite sides of the base and releasably engageahle with said pistons whereby closing pressure isapplied ito said molds, said pistonsbeingof greater diameter than the minimum diameter of the molding cavities ofthe molds. i

In testimony whereof I aflix my signature.

1 HAROLD DENMIRE. 7

.- er is much faster thanlthose previously proposed and the dangers of incompletely closed, i. 

